const env = require('./config.js'); //配置文件，在这文件里配置你的OSS keyId和KeySecret,timeout:87600;
const base64 = require('./base64.js');//Base64,hmac,sha1,crypto相关算法
require('./hmac.js');
require('./sha1.js');
const Crypto = require('./crypto.js');
import {formatDate} from "@/common/common.js"
/*
 *上传文件到阿里云oss
 *@param - filePath :图片的本地资源路径
 *@param - dir:表示要传到哪个目录下
 *@param - successc:成功回调
 *@param - failc:失败回调
 */
const uploadFile = function (filePath, file, successc, failc) {
    if (!filePath || filePath.length < 9) {
        uni.showModal({
            title: '图片错误',
            content: '请重试',
            showCancel: false,
        })
        return;
    }
    let date = formatDate(new Date(), 'yyyy-MM-dd_hh.mm.ss')
    //图片名字 可以自行定义，     这里是采用当前的时间戳 + 150内的随机数来给图片命名的
    const aliyunFileKey = `${date}_${file && file.name ? file.name : 'mobile'}`
    console.log("aliyunFileKey", aliyunFileKey)
    const aliyunServerURL = env.uploadImageUrl;//OSS地址，需要https
    const accessid = env.OSSAccessKeyId;
    const policyBase64 = getPolicyBase64();
    const signature = getSignature(policyBase64);//获取签名

    uni.uploadFile({
        url: aliyunServerURL,//开发者服务器 url
        filePath: filePath,//要上传文件资源的路径
        name: 'file',//必须填file
        timeout: 10 * 1000,
        formData: {
            'key': aliyunFileKey,
            'policy': policyBase64,
            'OSSAccessKeyId': accessid,
            'signature': signature,
            'success_action_status': '200'
        },
        header: {'content-type': 'multipart/form-data'},
        success: function (res) {
            console.log(res);
            if (res.statusCode != 200) {
                failc(new Error('上传错误:' + JSON.stringify(res)))
                return;
            }
            // successc(aliyunServerURL + aliyunFileKey);
            successc(aliyunFileKey, aliyunServerURL + aliyunFileKey);
        },
        fail: function (err) {
            err.wxaddinfo = aliyunServerURL;
            failc(err);
        },
    })
}

const getPolicyBase64 = function () {
    let date = new Date();
    date.setHours(date.getHours() + env.timeout);
    let srcT = date.toISOString();
    const policyText = {
        "expiration": srcT, //设置该Policy的失效时间，超过这个失效时间之后，就没有办法通过这个policy上传文件了
        "conditions": [
            ["content-length-range", 0, 5 * 1024 * 1024] // 设置上传文件的大小限制,5mb
        ]
    };

    const policyBase64 = base64.encode(JSON.stringify(policyText));
    console.log(policyBase64);
    return policyBase64;
}

const getSignature = function (policyBase64) {
    const accesskey = env.AccessKeySecret;

    const bytes = Crypto.HMAC(Crypto.SHA1, policyBase64, accesskey, {
        asBytes: true
    });
    const signature = Crypto.util.bytesToBase64(bytes);
    console.log(signature);
    return signature;
}

module.exports = uploadFile;
